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| Illustration 1 | g01447935 |
Hydraulic steering system schematic (1) Left steering cylinder (2) Right steering cylinder (3) Crossover relief valve (4) Shuttle valve (5) Steering control valve (6) Shuttle valve (7) Diverter valve (8) Relief valve (9) Secondary steering relief valve (10) Oil cooler (11) Pressure reducing valve (12) Screen (13) Steering quad check valve (14) Neutralizer valves (15) Screen (16) Selector and pressure control valve (17) Gear pump (secondary steering) (18) Bypass pressure switch (19) Filter (20) Piston pump (steering) (21) Piston pump (steering) (22) Filter for the pilot steering (23) Gear pump (steering pilot) (24) Steering and brake hydraulic tank (25) Breaker relief valve (26) Pilot control valve (27) Pilot relief valve (A) Warning signal | |
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| Illustration 2 | g01652657 |
Left side view (1) Left steering cylinder (5) Steering control valve (10) Oil cooler (13) Steering quad check valve (14) Neutralizer valves (16) Pilot valve (STIC steering) (20) Piston pump (steering) (21) Piston pump (steering) (23) Gear pump (steering pilot) (24) Steering and brake hydraulic tank | |
- Oil filter and oil cooler circuit
- Pilot circuit
- High pressure circuit
- Secondary steering circuit (if equipped)
The secondary steering system is optional. Some machines may also include this circuit.
The main components of the oil filter circuit and the oil cooler circuit include the following items: pilot relief valve (27) , oil cooler (10) , steering pilot filter (22) , hydraulic tank for the steering and brake system (24) and steering pilot gear pump (23) .
The main components of the pilot circuit include the following items: steering quad check valves (13) , steering pressure reducing valve (11) , steering neutralizer valves (14) , backup relief valve (8) , oil cooler (10) , pilot control valve (26) , hydraulic tank (24) and steering pilot gear pump (23) .
The main components of the high pressure circuit include the following items: left steering cylinder (1) , right steering cylinder (2) , steering control valve (5) , selector and pressure control valve (16) , steering piston pumps (20) and hydraulic tank (24) .
Hydraulic tank (24) is located on the left side of the machine next to the cab. Access is gained by opening an access door. Fill the tank to the correct oil level, if necessary. The filler cap is located on the top of the hydraulic tank for the steering and brake systems. A breaker relief valve is located on the top of the hydraulic tank for the steering and brake systems.
Steering control valve (5) , steering pressure reducing valve (11) , and selector and pressure control valve (16) are located on the left side of the machine under the operator's cab.
Pilot control valve (26) is located in the operator's cab.
Steering piston pumps (20) and (21) and steering pilot gear pump (23) are located in the pump area that is rotated behind the operator's cab. The steering pumps have an oil filter for the case drain oil. The case drain filter has a bypass check valve. The bypass check has a warning switch (18. When the case drian filter is bypassed, an indicator that is located in the cab will alert the operator that the case drain filter is clogged.) .
Steering control valve (5) and steering pilot oil filter (19) are located behind the operator's cab. Steering pilot oil filter (19) contains a bypass check valve. The bypass check valve is located in the base of the filter assembly.
Neutralizer valves (14) are located near the articulated hitch and under the operator's cab.